题目内容

接触面上停滞区的摩擦力是线性分布的。

A. 对
B. 错

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摩擦条件对接触面上正应力的分布没有影响。

A. 对
B. 错

接触面上滑动区的摩擦条件是库伦摩擦。

A. 对
B. 错

It _____ a time when they had some control over their fate.[音频](来源:NPR News)

A. makes them feel guilty for
B. makes them think of

And we want every citizen to _____ this land that we all love so much.[音频](来源:欧美名人演讲)

A. feel ashamed about
B. take pride in

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